A quantitative pouring device for aluminum alloy extrusion casting

Abstract

The invention discloses a quantitative pouring device for aluminum alloy extrusion casting, which belongs to the field of metal casting. The invention aims at the problem that the aluminum alloy has relatively active chemical properties, the aluminum alloy melt contacts the external environment for a long time during the pouring process, oxidation phenomenon is easy to occur, and the metal pouring amount during the extrusion casting process needs to be accurately controlled. The invention uses a piston push rod of a quantitative volume chamber of the metal melt to suck the metal melt from a metal melt heating and insulation furnace into the quantitative volume chamber of the metal melt along a metal melt suction pipe or flows out of the quantitative volume chamber of the metal melt along a metal melt outflow pipe, and maintains a sealed state during the process. By adjusting the position of the side shaft of the connecting rod rotating wheel in the T-slot of the driving rotating wheel of the push rod lifting slider, the limit position of the upward and downward movement of the piston push rod lifting slider of the metal melt quantitative volume chamber can be controlled, so that the maximum volume of the forming cavity surrounded by the piston push rod of the metal melt quantitative volume chamber and the metal melt quantitative volume chamber can be adjusted to achieve quantitative suction of the metal melt.

Description

Technical Field

[0001] The invention belongs to the field of metal casting, and in particular relates to a quantitative pouring device for aluminum alloy extrusion casting. Background Art

[0002] With the development of science and technology, the quality requirements for castings are getting higher and higher. In order to further adapt to the current needs of energy saving, environmental protection and lightweight, a large part of the products are currently replaced by lightweight materials. Among them, aluminum alloy has a lower density value, a higher specific strength value and a higher specific stiffness value, and excellent corrosion resistance. Therefore, the demand for aluminum and aluminum alloy products in all walks of life is increasing, so higher requirements are also put forward for the quality of aluminum alloy products. Squeeze casting is also known as liquid die forging. It organically combines the characteristics of casting and forging. At present, aluminum alloy extrusion castings are widely used in automobiles, home appliances, aerospace and other fields. In the process of aluminum alloy extrusion casting, it used to rely more on manual experience, so there are problems such as high labor intensity and harsh environment. In addition, the chemical properties of aluminum alloy are relatively active. During the pouring process, the aluminum alloy melt is in contact with the external environment for a long time, and oxidation is prone to occur. At the same time, the metal pouring amount in the extrusion casting process is also a very important parameter. If the accurate control of the pouring volume cannot be guaranteed, it will affect the quality of the extrusion casting workpiece and increase the production cost. Summary of the invention

[0003] In view of the problems existing in the above-mentioned metal melt extrusion casting process, the present invention proposes an aluminum alloy extrusion casting quantitative pouring device, which mainly includes: a metal melt heating and insulation furnace 1, a metal melt quantitative volume chamber 2, a metal melt quantitative volume chamber piston push rod 3, a metal melt quantitative volume chamber fixed support frame 4, an extrusion casting quantitative pouring device base 5, a metal melt quantitative volume chamber piston push rod lifting slider 6, a metal melt quantitative volume chamber piston push rod crossbeam 7, a push rod lifting slider driving wheel 8, a push rod lifting slider driving wheel fixed bracket 9, left and right column connecting crossbeams 10, a push rod lifting slider driving connecting rod 11, a connecting rod wheel side rotating shaft 12, an extrusion casting quantitative pouring device left column 13, an extrusion casting quantitative pouring device right column 14, a metal melt suction pipe high-temperature solenoid valve 15, a connecting rod wheel side rotating shaft locking nut 16, a metal melt outflow pipe high-temperature solenoid valve 17, a metal melt outflow pipe 18 and a metal melt suction pipe 19.

[0004] The metal melt heating and insulation furnace 1 is placed above the base 5 of the extrusion casting quantitative pouring device. An upper end cover is provided above the metal melt heating and insulation furnace 1 to form a seal for the metal melt in the metal melt heating and insulation furnace 1. The left column 13 of the extrusion casting quantitative pouring device and the right column 14 of the extrusion casting quantitative pouring device are arranged on both sides of the metal melt heating and insulation furnace 1 and are fixedly installed on the base 5 of the extrusion casting quantitative pouring device. The upper parts of the left column 13 of the extrusion casting quantitative pouring device and the right column 14 of the extrusion casting quantitative pouring device are fixedly connected to the left and right column connecting crossbeams 10. The right column 14 of the extrusion casting quantitative pouring device is fixedly provided with a metal melt quantitative volume chamber fixed support frame 4. The left end of the metal melt quantitative volume chamber fixed support frame 4 is provided with a through hole. The metal melt quantitative volume chamber 2 is fixedly installed in the through hole of the metal melt quantitative volume chamber fixed support frame 4. The push rod lifting slider driving wheel fixing bracket 9 is fixedly installed on the left column 13 of the extrusion casting quantitative pouring device. The push rod lifting slider driving wheel fixing bracket 9 is provided with a push rod lifting slider driving wheel 8 on the left side. The push rod lifting slider driving wheel 8 is driven to rotate by a stepping motor. The push rod lifting slider driving wheel 8 is provided with an arc T-shaped groove, and a connecting rod wheel side rotating shaft 12 is installed in the T-shaped groove. The connecting rod wheel side rotating shaft 12 can slide in the T-shaped groove and is fixed to the push rod lifting slider driving wheel 8 through the connecting rod wheel side rotating shaft locking nut 16. One end of the push rod lifting slider driving connecting rod 11 is connected to the end of the connecting rod wheel side rotating shaft 12, and can rotate around the front end axis of the connecting rod wheel side rotating shaft 12. The other end of the push rod lifting slider driving connecting rod 11 is connected to the front shaft head of the metal melt quantitative volume chamber piston push rod lifting slider 6, and can rotate around the front shaft head of the metal melt quantitative volume chamber piston push rod lifting slider 6.

[0005] The inner hole of the piston push rod lifting slide block 6 of the metal melt quantitative volume chamber matches the outer diameter of the left column 13 of the extrusion casting quantitative pouring device, and can slide along the axial direction of the left column 13 of the extrusion casting quantitative pouring device. The metal melt quantitative volume chamber piston push rod cross beam 7 is fixedly installed on the right side of the metal melt quantitative volume chamber piston push rod lifting slide block 6, and the right end of the metal melt quantitative volume chamber piston push rod cross beam 7 is fixedly connected to the metal melt quantitative volume chamber piston push rod 3. The metal melt quantitative volume chamber piston push rod 3 is placed in the metal melt quantitative volume chamber 2, and the cylindrical side surface of the lower end of the metal melt quantitative volume chamber piston push rod 3 is matched and connected with the inner cavity of the metal melt quantitative volume chamber 2. The metal melt quantitative volume chamber 2 is provided with a metal melt suction pipe 19 and a metal melt outflow pipe 18 on the left and right sides respectively, and the metal melt suction pipe 19 and the metal melt outflow pipe 18 are provided with a metal melt suction pipe high temperature solenoid valve 15 and a metal melt outflow pipe high temperature solenoid valve 17 respectively above the metal melt suction pipe 19 and the metal melt outflow pipe 18. The molten metal suction pipe 19 is inserted into the molten metal in the molten metal heating and insulation furnace 1 through the through hole of the upper end cover of the molten metal heating and insulation furnace 1 .

[0006] Preferably, a heating coil is provided on the outside of the molten metal heating and insulation furnace 1 to keep the molten metal at a constant temperature; a heating coil is also provided on the outside of the molten metal quantitative volume chamber 2 to play a role in heat preservation.

[0007] The distance between the bottom of the molten metal suction pipe 19 and the inner bottom of the molten metal heating and insulation furnace 1 is 10-15 cm.

[0008] The experimental process of using the aluminum alloy extrusion casting quantitative pouring device proposed by the present invention is as follows:

[0009] 1) According to the required volume of the molten metal, adjust the position of the connecting rod wheel side shaft 12 in the T-slot of the push rod lifting slider driving wheel 8, open the high-temperature solenoid valve 15 of the molten metal suction pipeline, and close the high-temperature solenoid valve 17 of the molten metal outflow pipeline, so that the piston push rod 3 of the molten metal quantitative volume chamber is located at the bottom of the molten metal quantitative volume chamber 2.

[0010] 2) The rear input shaft of the push rod lifting slider driving wheel 8 is connected to the stepper motor, and the rotation of the stepper motor drives the push rod lifting slider to drive the wheel 8 to rotate. The rotation of the push rod lifting slider driving the wheel 8 drives the push rod lifting slider to drive the connecting rod 11 to move through the connecting rod wheel side shaft 12. The movement of the push rod lifting slider driving the connecting rod 11 pushes the metal melt quantitative volume chamber piston push rod lifting slider 6 to move upward, and the metal melt quantitative volume chamber piston push rod lifting slider 6 drives the metal melt quantitative volume chamber piston push rod crossbeam 7 and the metal melt quantitative volume chamber piston push rod 3 to move upward. At this time, a certain amount of metal melt is sucked out of the metal melt heating and insulation furnace 1 and enters the inner cavity formed by the metal melt quantitative volume chamber piston push rod 3 and the metal melt quantitative volume chamber 2 through the metal melt suction pipe 19.

[0011] 3) When the piston push rod 3 of the metal melt quantitative volume chamber moves upward to the limit position, the high-temperature solenoid valve 15 of the metal melt suction pipe is closed, and the high-temperature solenoid valve 17 of the metal melt outflow pipe is opened. The piston push rod 3 of the metal melt quantitative volume chamber moves downward to push a certain amount of metal melt into the pressure chamber of the extrusion casting through the metal melt outflow pipe 18. At this time, the piston push rod 3 of the metal melt quantitative volume chamber moves downward to the bottom of the internal cavity of the metal melt quantitative volume chamber 2.

[0012] Beneficial Effects of the Invention

[0013] By adjusting the position of the connecting rod wheel side shaft 12 in the T-slot of the push rod lifting slider driving wheel 8, the limit position of the up and down movement of the piston push rod lifting slider 6 of the metal melt quantitative volume chamber can be controlled, so that the maximum volume of the molding cavity surrounded by the piston push rod 3 of the metal melt quantitative volume chamber and the metal melt quantitative volume chamber 2 can be adjusted to achieve quantitative suction of the metal melt. The metal melt heating and insulation furnace 1 and the metal melt quantitative volume chamber 2 are both in a sealed state, which can effectively reduce the oxidation of the metal melt. The metal melt heating and insulation furnace 1 and the metal melt quantitative volume chamber 2 are both equipped with heating coils, which can effectively maintain the temperature of the metal melt. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The front view of a quantitative pouring device for aluminum alloy extrusion casting

[0015] Figure 2 A top view of a quantitative pouring device for aluminum alloy extrusion casting

[0016] Figure numerals: Metal melt heating and insulation furnace 1, Metal melt quantitative volume chamber 2, Metal melt quantitative volume chamber piston push rod 3, Metal melt quantitative volume chamber fixed support frame 4, Extrusion casting quantitative pouring device base 5, Metal melt quantitative volume chamber piston push rod lifting slider 6, Metal melt quantitative volume chamber piston push rod crossbeam 7, Push rod lifting slider driving wheel 8, Push rod lifting slider driving wheel fixed bracket 9, Left and right column connecting crossbeam 10, Push rod lifting slider driving connecting rod 11, Connecting rod wheel side rotating shaft 12, Extrusion casting quantitative pouring device left column 13, Extrusion casting quantitative pouring device right column 14, Metal melt suction pipeline high temperature solenoid valve 15, Connecting rod wheel side rotating shaft locking nut 16, Metal melt outflow pipeline high temperature solenoid valve 17, Metal melt outflow pipeline 18, Metal melt suction pipeline 19 DETAILED DESCRIPTION

[0017] The specific implementation is described in conjunction with the accompanying drawings. The metal melt is aluminum alloy A356. An aluminum alloy extrusion casting quantitative pouring device is composed of a metal melt heating and insulation furnace 1, a metal melt quantitative volume chamber 2, a metal melt quantitative volume chamber piston push rod 3, a metal melt quantitative volume chamber fixed support frame 4, an extrusion casting quantitative pouring device base 5, a metal melt quantitative volume chamber piston push rod lifting slider 6, a metal melt quantitative volume chamber piston push rod crossbeam 7, a push rod lifting slider driving wheel 8, a push rod lifting slider driving wheel fixed bracket 9, left and right column connecting crossbeams 10, a push rod lifting slider driving connecting rod 11, a connecting rod wheel side rotating shaft 12, an extrusion casting quantitative pouring device left column 13, an extrusion casting quantitative pouring device right column 14, a metal melt suction pipeline high temperature solenoid valve 15, a connecting rod wheel side rotating shaft locking nut 16, a metal melt outflow pipeline high temperature solenoid valve 17, a metal melt outflow pipeline 18, and a metal melt suction pipeline 19.

[0018] The molten metal heating and insulation furnace 1 is placed above the base 5 of the extrusion casting quantitative pouring device. The molten metal is loaded in the molten metal heating and insulation furnace 1. A heating coil is arranged on the outside of the molten metal heating and insulation furnace 1 to keep the molten metal at a constant temperature. An upper end cover is arranged above the molten metal heating and insulation furnace 1 to seal the molten metal in the molten metal heating and insulation furnace 1. The left column 13 of the extrusion casting quantitative pouring device and the right column 14 of the extrusion casting quantitative pouring device are arranged on both sides of the molten metal heating and insulation furnace 1 and fixedly mounted on the base 5 of the extrusion casting quantitative pouring device. The upper parts of the left column 13 of the extrusion casting quantitative pouring device and the right column 14 of the extrusion casting quantitative pouring device are fixedly connected to the left and right column connecting beams 10. A metal melt quantitative volume chamber fixed support frame 4 is fixedly mounted on the right column 14 of the extrusion casting quantitative pouring device. A through hole is provided at the left end of the metal melt quantitative volume chamber fixed support frame 4. The metal melt quantitative volume chamber 2 is fixedly mounted in the through hole of the metal melt quantitative volume chamber fixed support frame 4. A heating coil is also provided on the outside of the metal melt quantitative volume chamber 2 to play a role in heat preservation.

[0019] The push rod lifting slider driving wheel fixing bracket 9 is fixedly installed on the left column 13 of the extrusion casting quantitative pouring device through a pin, and the push rod lifting slider driving wheel fixing bracket 9 is provided with a push rod lifting slider driving wheel 8 on the left side, and the push rod lifting slider driving wheel 8 is driven to rotate by a stepping motor, and an arc T-shaped slot is provided on the push rod lifting slider driving wheel 8, and a connecting rod wheel side rotating shaft 12 is installed in the T-shaped slot, and the connecting rod wheel side rotating shaft 12 is fixedly connected to the push rod lifting slider driving wheel 8 through a connecting rod wheel side rotating shaft locking nut 16. One end of the push rod lifting slider driving connecting rod 11 is connected to the end of the connecting rod wheel side rotating shaft 12, and can rotate around the axis of the connecting rod wheel side rotating shaft 12. The other end of the push rod lifting slider driving connecting rod 11 is connected to the front shaft head of the metal melt quantitative volume chamber piston push rod lifting slider 6, and can rotate around the front shaft head of the metal melt quantitative volume chamber piston push rod lifting slider 6. The inner hole of the piston push rod lifting slide block 6 of the metal melt quantitative volume chamber matches the outer diameter of the left column 13 of the extrusion casting quantitative pouring device, and can slide along the axial direction of the left column 13 of the extrusion casting quantitative pouring device. The metal melt quantitative volume chamber piston push rod cross beam 7 is fixedly installed on the right side of the metal melt quantitative volume chamber piston push rod lifting slide block 6, and the right end of the metal melt quantitative volume chamber piston push rod cross beam 7 is fixedly connected to the metal melt quantitative volume chamber piston push rod 3. The metal melt quantitative volume chamber piston push rod 3 is placed in the metal melt quantitative volume chamber 2, and the cylindrical side surface of the lower end of the metal melt quantitative volume chamber piston push rod 3 is matched and connected with the inner cavity of the metal melt quantitative volume chamber 2, which is used to seal the metal melt quantitative volume chamber piston push rod 3 and the cavity surrounded by the metal melt quantitative volume chamber 2. A metal melt suction pipe 19 and a metal melt outflow pipe 18 are respectively installed on the left and right sides below the metal melt quantitative volume chamber 2, and a metal melt suction pipe high-temperature solenoid valve 15 and a metal melt outflow pipe high-temperature solenoid valve 17 are respectively installed above the metal melt suction pipe 19 and the metal melt outflow pipe 18. The metal melt suction pipe 19 is inserted into the metal melt of the metal melt heating and insulation furnace 1 through the through hole of the upper end cover of the metal melt heating and insulation furnace 1, and the distance between the bottom of the metal melt suction pipe 19 and the inner bottom of the metal melt heating and insulation furnace 1 is about 10-15 cm.

[0020] The experimental process of using the aluminum alloy extrusion casting quantitative pouring device proposed by the present invention is as follows:

[0021] First, according to the required volume of the metal melt, the position of the connecting rod wheel side rotating shaft 12 in the T-slot of the push rod lifting slider driving wheel 8 is adjusted, the high temperature solenoid valve 15 of the metal melt suction pipeline is opened, and the high temperature solenoid valve 17 of the metal melt outflow pipeline is closed, so that the piston push rod 3 of the metal melt quantitative volume chamber is located at the bottom of the metal melt quantitative volume chamber 2. The rear input shaft of the push rod lifting slider driving wheel 8 is connected to the stepper motor, and the rotation of the stepper motor drives the push rod lifting slider driving wheel 8 to rotate. The rotation of the push rod lifting slider driving wheel 8 drives the push rod lifting slider driving connecting rod 11 to move through the connecting rod wheel side rotating shaft 12. The movement of the push rod lifting slider driving connecting rod 11 pushes the piston push rod lifting slider 6 of the metal melt quantitative volume chamber to move upward, and the piston push rod lifting slider 6 of the metal melt quantitative volume chamber drives the piston push rod cross beam 7 of the metal melt quantitative volume chamber and the piston push rod 3 of the metal melt quantitative volume chamber to move upward. At this time, a certain amount of molten metal is sucked out of the molten metal heating and insulation furnace 1, and enters the inner cavity formed by the piston push rod 3 of the molten metal quantitative volume chamber and the molten metal quantitative volume chamber 2 through the molten metal suction pipe 19. When the piston push rod 3 of the molten metal quantitative volume chamber moves upward to the limit position, the high-temperature solenoid valve 15 of the molten metal suction pipe is closed, and the high-temperature solenoid valve 17 of the molten metal outflow pipe is opened. The piston push rod 3 of the molten metal quantitative volume chamber moves downward to push the certain amount of molten metal into the extrusion casting pressure chamber through the molten metal outflow pipe 18. At this time, the piston push rod 3 of the molten metal quantitative volume chamber moves downward to the bottom of the internal cavity of the molten metal quantitative volume chamber 2.

Claims

1. A quantitative pouring device for aluminum alloy extrusion casting, characterized in that: The device mainly comprises: a metal melt heating and insulation furnace (1), a metal melt quantitative volume chamber (2), a metal melt quantitative volume chamber piston push rod (3), a metal melt quantitative volume chamber fixed support frame (4), an extrusion casting quantitative pouring device base (5), a metal melt quantitative volume chamber piston push rod lifting slider (6), a metal melt quantitative volume chamber piston push rod cross beam (7), a push rod lifting slider driving wheel (8), a push rod lifting slider driving wheel fixed support (9), left and right column connecting cross beams (10), a push rod lifting slider driving connecting rod (11), a connecting rod wheel side rotating shaft (12), an extrusion casting quantitative pouring device left column (13), an extrusion casting quantitative pouring device right column (14), a metal melt suction pipe high temperature solenoid valve (15), a connecting rod wheel side rotating shaft locking nut (16), a metal melt outflow pipe high temperature solenoid valve (17), a metal melt outflow pipe (18) and a metal melt suction pipe (19); The molten metal heating and insulation furnace (1) is placed above the base (5) of the extrusion casting quantitative pouring device. An upper end cover is provided above the molten metal heating and insulation furnace (1) to form a seal for the molten metal in the molten metal heating and insulation furnace (1). The left column (13) of the extrusion casting quantitative pouring device and the right column (14) of the extrusion casting quantitative pouring device are arranged on both sides of the molten metal heating and insulation furnace (1) and are fixedly installed on the base (5) of the extrusion casting quantitative pouring device. The left column (13) of the device and the right column (14) of the extrusion casting quantitative pouring device are fixedly connected to the left and right column connecting crossbeams (10); a metal melt quantitative volume chamber fixed support frame (4) is fixedly mounted on the right column (14) of the extrusion casting quantitative pouring device, a through hole is provided at the left end of the metal melt quantitative volume chamber fixed support frame (4), and the metal melt quantitative volume chamber (2) is fixedly mounted in the through hole of the metal melt quantitative volume chamber fixed support frame (4); a push rod lifts a slide block to drive a rotating wheel The fixed bracket (9) is fixedly mounted on the left column (13) of the extrusion casting quantitative pouring device. The left side of the push rod lifting slider driving wheel fixed bracket (9) is equipped with a push rod lifting slider driving wheel (8). The push rod lifting slider driving wheel (8) is driven to rotate by a stepping motor. The push rod lifting slider driving wheel (8) is provided with an arc T-shaped groove. The T-shaped groove is equipped with a connecting rod wheel side rotating shaft (12). The connecting rod wheel side rotating shaft (12) can slide in the T-shaped groove. The shaft locking nut (16) is fixed to the push rod lifting slider driving wheel (8); one end of the push rod lifting slider driving connecting rod (11) is connected to the end of the connecting rod rotating wheel side rotating shaft (12) and can rotate around the front end axis of the connecting rod rotating wheel side rotating shaft (12); the other end of the push rod lifting slider driving connecting rod (11) is connected to the front shaft head of the metal melt quantitative volume chamber piston push rod lifting slider (6) and can rotate around the front shaft head of the metal melt quantitative volume chamber piston push rod lifting slider (6); The inner hole of the piston push rod lifting slide block (6) of the metal melt quantitative volume chamber matches the outer diameter of the left column (13) of the extrusion casting quantitative pouring device and can slide along the axial direction of the left column (13) of the extrusion casting quantitative pouring device; the metal melt quantitative volume chamber piston push rod cross beam (7) is fixedly installed on the right side of the metal melt quantitative volume chamber piston push rod lifting slide block (6), and the right end of the metal melt quantitative volume chamber piston push rod cross beam (7) is fixedly connected to the metal melt quantitative volume chamber piston push rod (3); the metal melt quantitative volume chamber piston push rod (3) is placed in the metal melt quantitative volume chamber (2), and the metal melt quantitative volume chamber The cylindrical side surface at the lower end of the piston push rod (3) is connected to the inner cavity of the metal melt quantitative volume chamber (2); a metal melt suction pipe (19) and a metal melt outflow pipe (18) are respectively installed on the left and right sides below the metal melt quantitative volume chamber (2); a metal melt suction pipe high-temperature solenoid valve (15) and a metal melt outflow pipe high-temperature solenoid valve (17) are respectively installed above the metal melt suction pipe (19) and the metal melt outflow pipe (18); the metal melt suction pipe (19) is inserted into the metal melt in the metal melt heating and insulation furnace (1) through a through hole in the upper end cover of the metal melt heating and insulation furnace (1).

2. The aluminum alloy extrusion casting quantitative pouring device according to claim 1, characterized in that: A heating coil is arranged outside the molten metal heating and insulation furnace (1), and a heating coil is also arranged outside the molten metal quantitative volume chamber (2).

3. The aluminum alloy extrusion casting quantitative pouring device according to claim 1, characterized in that: The distance between the bottom of the molten metal suction pipe (19) and the inner bottom of the molten metal heating and insulation furnace (1) is 10-15 cm.

4. The pouring method of the aluminum alloy extrusion casting quantitative pouring device according to claim 1, characterized in that: The specific steps of this method are as follows: 1) adjusting the position of the connecting rod wheel side rotating shaft (12) in the T-slot of the push rod lifting slider driving wheel (8) according to the required volume of the metal melt, opening the high-temperature electromagnetic valve (15) of the metal melt suction pipeline, closing the high-temperature electromagnetic valve (17) of the metal melt outflow pipeline, so that the piston push rod (3) of the metal melt quantitative volume chamber is located at the bottom of the metal melt quantitative volume chamber (2); 2) The rear input shaft of the push rod lifting slider driving wheel (8) is connected to the stepping motor. The rotation of the stepping motor drives the push rod lifting slider driving wheel (8) to rotate. The rotation of the push rod lifting slider driving wheel (8) drives the push rod lifting slider driving connecting rod (11) to move through the connecting rod rotating wheel side rotating shaft (12). The movement of the push rod lifting slider driving connecting rod (11) drives the metal melt quantitative volume chamber piston push rod lifting slider (6) to move upward. The metal melt quantitative volume chamber piston push rod lifting slider (6) drives the metal melt quantitative volume chamber piston push rod cross beam (7) and the metal melt quantitative volume chamber piston push rod (3) to move upward. At this time, a certain amount of metal melt is sucked out of the metal melt heating and insulation furnace (1) and enters the inner cavity formed by the metal melt quantitative volume chamber piston push rod (3) and the metal melt quantitative volume chamber (2) through the metal melt suction pipe (19); 3) When the piston push rod (3) of the metal melt quantitative volume chamber moves upward to the limit position, the high-temperature solenoid valve (15) of the metal melt suction pipe is closed, and the high-temperature solenoid valve (17) of the metal melt outflow pipe is opened. The piston push rod (3) of the metal melt quantitative volume chamber moves downward to push a certain amount of metal melt into the pressure chamber of the extrusion casting through the metal melt outflow pipe (18). At this time, the piston push rod (3) of the metal melt quantitative volume chamber moves downward to the bottom of the internal cavity of the metal melt quantitative volume chamber (2).

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